diff --git a/src/_pytest/python.py b/src/_pytest/python.py
index 06d853f78..e5a62cc92 100644
--- a/src/_pytest/python.py
+++ b/src/_pytest/python.py
@@ -906,6 +906,10 @@ class CallSpec2(object):
             getattr(self, valtype_for_arg)[arg] = val
             self.indices[arg] = param_index
             self._arg2scopenum[arg] = scopenum
+        print("DEBUG: setmulti2 method called")
+        print(f"DEBUG: argnames: {argnames}")
+        print(f"DEBUG: valset: {valset}")
+        print(f"DEBUG: scopenum: {scopenum}")
         self._idlist.append(id)
         self.marks.extend(normalize_mark_list(marks))
 
